实用医学杂志 ›› 2021, Vol. 37 ›› Issue (8): 994-999.doi: 10.3969/j.issn.1006⁃5725.2021.08.007

• 基础研究 • 上一篇    下一篇

氯喹通过阻断肿瘤坏死因子受体相关因子3自噬性降解抑制类风湿关节炎滑膜细胞活化

吕昌伟, 和晶, 张乾, 郗海涛 ,强毅, 张静涛    

  1. 西北大学附属医院/西安市第三医院骨科(西安 710018)

  • 出版日期:2021-04-25 发布日期:2021-04-25
  • 通讯作者: 张静涛 E⁃mail:84046418@qq.com
  • 基金资助:
    陕西省重点研发计划项目⁃社会发展领域(编号:2019SF⁃194)

Chloroquine inhibits the activation of fibroblast ⁃ like synoviocyte by blocking autophagic degradation of TRAF3 in rheumatoid arthritis

LÜ Changwei,HE Jing,ZHANG Qian,XI Haitao,QIANG Yi,ZHANG Jing⁃ tao   

  1. Department of Orthopedic,Affiliated Hospital of Northwestern University,Xi′an No.3 Hospital,Xi′an 710018 China

  • Online:2021-04-25 Published:2021-04-25
  • Contact: ZHANG Jingtao E⁃mail:84046418@qq.com

摘要:

目的 本研究探讨氯喹对类风湿关节炎滑膜细胞活化的抑制作用及其分子机制。方法 TNF⁃α预刺激 MH7A 细胞建立类风湿关节炎滑膜细胞活化模型,检测氯喹对 MH7A 细胞增殖、促炎因子 IL⁃6 CXCL10,以及对基质金属蛋白酶(matrix metalloproteinase,MMP)MMP⁃2 MMP⁃9 的影响。检测氯喹对 MH7A 细胞肿瘤坏死因子受体相关因子 3(TNF receptor associated factor 3,TRAF3)表达和自噬的影响,采用 siRNA 干扰 TRAF3 表达,并采用自噬诱导剂雷帕霉素诱导细胞自噬,研究 TRAF3 在氯喹抑制滑膜细胞活化中的作用及其机制。结果 氯喹有效抑制了 MH7A 滑膜细胞增殖,减少了 IL⁃6 CXCL10 分泌, 并降低了 MMP⁃2 MMP⁃9 表达。氯喹不上调 TRAF3 表达,但可增加 TRAF3 蛋白含量,并介导了氯喹对滑 膜细胞活化的抑制。氯喹可抑制细胞自噬,而雷帕霉素可降低 TRAF3 的蛋白水平,并拮抗氯喹对滑膜细 胞活化的抑制。结论 氯喹可通过抑制自噬性降解,增加细胞内 TRAF3 蛋白含量,并通过 TRAF3 抑制类风湿性关节炎滑膜细胞异常活化。

关键词:

Abstract:

Objective Traditional Chinese medicine chloroquine(CQ)has been used as one of the main drugs for rheumatoid arthritis treatment,but its mechanism of action is still unclear. This study investigated the inhibitory effect of CQ on the activation of fibroblast⁃like synoviocyte(FLS)in rheumatoid arthritis and its molecular mechanism. Methods MH7A cells were pre⁃stimulated by TNF⁃α to establish a FLS activation model for rheuma⁃ toid arthritis. The effects of CQ on MH7A cell proliferation,pro⁃inflammatory cytokines IL⁃6 and CXCL10,and invasion proteins MMP⁃2 and MMP⁃9 were detected. Then,TRAF3 expression and autophagy in MH7A cells were evaluated after CQ treatment. Afterward,TRAF3 was down⁃regulated by siRNA and autophagy was induced by rapamycin to examine the role of TRAF3 in CQ ⁃induced inhibition of FLS activation and its mechanism. Results CQ effectively inhibited the proliferation of MH7A cells ,decreased the secretion of IL⁃6 and CXCL10 ,and reduced MMP⁃2 and MMP⁃9 expression. CQ did not up⁃regulate TRAF3 expression,but increased TRAF3 protein content. And the TRAF3 mediated the CQ⁃induced inhibition on FLS activation. CQ inhibited autophagy,while rapamycin reduced TRAF3 protein levels and antagonized the inhibition of chloroquine on FLS activation. Conclusion CQ can increase the TRAF3 protein in FLS by inhibiting autophagic degradation,and inhibit the abnormal activation of FLS in rheumatoid arthritis via TRAF3.

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